Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Cooling Water Intakes

Cooling Water Intakes -​ Final 2014 Rule for Existing Electric Generating Plants and Factories

Photo - Cooling towers
This rule covers roughly 1,065 existing facilities that are designed to withdraw at least 2 million gallons per day of cooling water. EPA estimates that 521 of these facilities are factories, and the other 544 are power plants.
  • The facilities are required to choose one of seven options to reduce mortality to fish and other aquatic organisms.
  • Facilities that withdraw at least 125 million gallons per day must conduct studies to help their permitting authority determine whether and what site-specific controls, if any, would be required to further reduce mortality of aquatic organisms.
  • New units added to an existing facility are required to reduce mortality of aquatic organisms that achieves one of two alternatives under national entrainmentWhen aquatic organisms, including eggs and larvae, are pulled from a water body into an industrial facility cooling system, passed through the heat exchanger, and then discharged back into the source water body. standards.
  • EPA consulted with the Fish and Wildlife Service and the National Marine Fisheries Service pursuant to the Endangered Species Act.
    • Final Biological Opinion and Appendices (May 19, 2014)
  • Final Rule: Federal Register Notice (August 15, 2014)
  • Support documents, including
    • Fact sheet and news release
    • Technical Development Document
      Engineering analysis of technologies and costs
    • Economic Analysis
      Economic cost and impact analyses
    • Benefits Analysis
      Analysis of environmental impacts and benefits of regulation of cooling water intakes
  • Docket Information: The supporting record for the final rule is available at Regulations.gov. The docket number for the rule is EPA-HQ-OW-2008-0667
  • Proposed Rule (2011), related notices

Cooling Water Intakes

  • Rulemaking History
  • Implementation Support
Contact Us about Cooling Water Intakes
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on February 28, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.